Rock-drilling machine.



No. 828,923. PATENTE!) AUG. 21, 1906. B. OAMMAS. ROCK DRILLING MACHINE.

. APPLIUATION FILED Nov.14. 1905.

ATTORNEY A UNITED* sTATEs PATENT oEEroE.

ROCK-DRILLING MACHINE.

Specification of Letters Patent.

Patented Aug. 21, 1906.

Application filed November 14, 1905. Serial No. 287.372.

To a/ZZ whom it may concern:

Be it known that I, BAPTISTE CAMMAs, a citizen of France, residing at Carbonado, in the county of Pierce and State of Washington, have invented certain new and useful Improvements in Rock-Drilling Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

This inventionrelates to manually-actuated rock-drilling machines such as are adapted to underground mining, and is in the nature of improvements to the invention or apparatus patented to Joachim Puechagut November 4,1902, No. 712,592.

The object is to provide an extremely-efficient and conveniently-operated rock-drill which will embody few and compactly-arranged parts and be capable of withstanding severe usage and with little liability of getting out of order, a further object being to provide a device of this character at a low cost, so as to make it available in situations where the expense of other boring-machines vis prohibitory.

With these ends in view my invention consists in the improved construction, adaptation, and combination of parts, which will be described hereinafter, and pointed out more particularly in the appended claims.

In the drawings, Figure 1 is a side elevation of a rock-drill constructed in accordance with my invention. Figs. 2 and 3 are enlarged detail views of the-'drill operating and feed devices, shown somewhat in section. Fig. 4 is a fragmentary front elevation of the machine-frame.

The reference-numeral 2 in the drawings indicates a post having at its opposite extremities lateral chambered offsets 3 and 4 for the housing of the adjustable extending and clamping barsand 6. The bar 5is desirably maintained at any extended position by means of a lock-bolt 7, which passes through the housing 3, while the other bar 6 is screw-threaded and registers with threads provided interiorly of its housing, and the last-named bar has desirably a transversely-arranged handle-rod 6 passing therethrough for manipulating the clamping action of the screw when securing the frame between the supportingwalls W or the like of the shaft or tunnel in which it is placed. i

Slidably mounted upon the frame-post is a carrier formed of a U-shaped piece 8 and a cover 9, which are secured together for clamping to the post by screws 10, provided with butterfly-nuts 10. The two said carrier parts are formed or provided at their opposite sides with protruding ears 11 and 11,

which are so disposed that those of one piece will be in alinement with the corresponding ears of the other and are similarly bored to provide sockets 12 and 12 to receive upon either side of the frame the trunnion `13. This trunnion is integrally connected in axial alinement to an axle 14 by the intermediate segmental portion 15 of a boss having an openable portion 16, which is hinged at 15 and has an arm 16, which is normally seated in a recess 14 of the axle.

An internally-threaded sleeve 17 is fitted within the boss and is provided with a series of transverse notches 17 in its external periphery, which are adapted to be severally engaged bya bridge-piece 15, rigidly provided or formed within the boss part 15. Extending axially through said sleeve and registering with the screw-threads thereof is a screwbar 18, having a longitudinal key way or ways 18 and terminating in angular tapering extremities, such at 18, which are interchangeably adapted to register with sockets formed inthe drill ferrule or holder 19. Secured to said screw-bar by spline or splines 20, slidably seated within the key way or ways, is a bevel-pinion 21, having teeth which mesh in- 1 power to be rendered, by a thumb-screw 25,-

passing through a slot 24 of said shankand engaging witha threaded aperture of the arm. Adjacent to the outer extremities of said trunnion and axle are peripheral grooves 26 and 27, respectively, about` which protrude the forked ends of locking-plates 28 and 29 for respectively preventing the accidental displacement of the said multiple gear from its IOO seat over the boss-arm 16 and of the trunnion 13 from its socket in the carrier. Bolts 32 and 33, with nuts 34 and 35, are utilized as suitable means for detachably securing said locking-plates in operative positions.

In operation the pinion 2l is retained in its lmovement of the pinion.

transposing the `pinion engagement between Y the variousl series of teeth of the multiple ear is accomplished by first disengaging the "ork of the plate 29 from the axle 14 to uncover the arm 16', when the boss can be' opened and the sleeve 17 moved'in an axial direction to rengage the bridge inl one of the unoccupied notches yof the sleeve. The

j pinion is then slid down against the sleeve Vzo and the other gear replaced in operative position and secured thereat by the lockingplate 29, as aforesaid. It is obvious that as the handle is turned the pinion is simultaneously rotated and with it, through the medium of the splines, the screw-bar 18, which carries and actuates the drill D, and as this screw is turned the thread thereof, acting in conjunction with the female one ofthe nonrotatable sleeve, effects the endwise movement or feed of the drill. In practice the drills are supplied to the o erator in various lengths, differing from eac other b about the length of the screw-bar, in or er that when the shorter drill has been sunk' into the work to its extreme depth the one of next greater length can be attached to the other end of the screw-bar, and when that has been reversed by swinging about the axes of the trunnion 13 the longer bar can be introduced into the hole bein made, and so on, replacing one drill by anot er, which are successively attached to the opposite ends of the screwbar without the necessity of retracting the bar more than sufficient to withdraw its tapered end from the tool-ferrule. Furthermore, in drilling holes to receive charges for blasting it is oftentimes advantageous to aperture the rock in groups having their holes in planes at a short distance apart or to position a hole or a group of holes in a plane out of that for which the operating mechanism is placed, andto attain such a result the trunnion 13 can be removed from one of the sockets -12 or 12 to the other without necessitating the changing of the location of the entire apparatus.

The drill, while applicable to an extended range of minin or quarrying work, is especially valuable in coal-mining. It is light to vhandle both in operation and in moving from place to place and can be readily taken down and put up and can be operated by one man to drill holes with great rapidity.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A rock-drilling machine consisting of a frame, a carrier adjustably mounted upon said frame, an openable boss provided with a trunnion and an axle extending. laterally therefrom and in axial alinement with each other, said boss being also provided with an internal transverse bridge-piece, an internally-threaded sle'eve within said boss and provided with a plurality of notches adapted to be severally engaged by said bridge-piece, a screw-bar seated within saidsleeve and provided with tapering ends, a pinion splined to said screw-bar, a multiple gear-wheel mounted upon said axle and upon an arm of the openable portion of said boss and provided 1 with means to retain in mesh any of its respective series of teeth with those of said pinion, an adjustable handle to said multiple gear-wheel, means to detachably secure the said boss to said carrier, and means to detachably secure said multiple wheel upon said axle.

2. In a rock-drilling machine, the combination with the screw-bar provided with means for securing a drill to either end thereof, a threaded sleeve upon said bar, a boss having a hinged part to be swung outwardly away from said sleeve embracing said sleeve and means provided in the boss engaging said sleeve for securing the latter in various positions axially thereof, of a pinion splined to said bar, and means for driving said pinion.

3. In a rock-drilling machine, the combination with the frame, the screw-bar and an Vinternally-threaded sleeve, of a boss and having a hinged part to be swung outwardly away from said sleeve supported bya'trunnion to a carrier adapted to be moved longitudinally'of said frame and means for securing said sleeve in various positions ofthe movement, a multiple gear mounted upon an axle projecting from one of the parts of said boss and an arm of the other part, and a pinion splined to said screw-bar.

4. In' a rock-drilling machine, in combination, a screw-bar, an internally-threaded sleeve adjustable thereon, a two-part boss openable upon a hinge soias to swing out'- wardly away from said sleeve, a trunnion and an axle on one of said boss parts, a multiple gear-wheel mounted upon said axle and an arm provided upon the other part of the boss, yand a pinion splined tosaid screw-bar.

5. In a rock-drilling machine, in combination, a screw-bar, an internally-threaded sleeve registering with said screw-bar and adjustable thereon, a boss embracing said sleeve and provided with an axle extending laterally therefrom said boss having an openable part formed with an extension seating in a IOO recess provided therefor in said axle, a multiand having one of said parts hinged to the other so as to be swung on its hinge outwardly away from said sleeve and provided with means for securing the latter at various positions relatively of its length, a multiple gear-wheel mounted upon an aXle protruding from said boss, and a pinion splined to said screw-bar.

7. In combination with a screw-bar, a member movable thereon, a second member having a hinged part to be swung outwardly away from saidv first member embracing said iirst member and having means for engagement with said hinged part whereby said members may be locked to one another at different points along the length of the irst member, a multiple gear-wheel, and a pinion splined on said screw-bar and engaging said irst member.

8. In combination with a screw-bar, a sleeve movable thereon and having spaced notches in its periphery, a member embracing said sleeve and having a movable part and a projection to engage in said notches said movable part and projection being disposed opposite to one another, a multiple gear-wheel supported from said member, and a pinion splined on the screw-bar.

v9. In combination with a screw-bar, a sleeve movable thereon, a member embodying a hinged part and a projection to engage in notches at intervals on said sleeve for locking the member at different points along the length of. said member, a pinion splined on the screw-bar, and a multiple gear-wheel carried by said member.

10. -In combination with a screw-bar, a sleeve movable thereon, a pinion splined on said bar, a member carrying a multiple gearwheel, .and a hinged part and a projection embraced by said member to engage said sleeve and lock said member thereto.

In testimony whereof I afhx my signature in presence of two witnesses.

BAPTISTE CAMMAS.

Witnesses LoUrs DALMON. ELLIS ROBERT-s. 

